1000w Blue Ice U Conversion LampA Metal Halide Lamp you can burn in a High Pressure Sodium Ballast. May be burned in any position.Manufacture Code: LM.1000W.U37.5.5KInitial Lumens: 100,000Sunmaster is the leader in Metal Halide lamp technology. Sunmaster designed this high tech lamp exclusively for the plant growth industry. People using High Pressure Sodium have seen poor growth during the grow stage of plant li... — Ships from Portland, Oregon USA...more info.